<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>定义列表</title>
</head>
<body>
   <dl>
       <dt>HTML</dt>
       <dd>超文本标记语言</dd>
       <dt>CSS</dt>
       <dd>层叠样式表</dd>
       <dt>javascript</dt>
       <dd>网页脚本语言</dd>
   </dl> 
</body>
</html>